From 5dced3d1b3deca80e01415a2e35dc7972dcbfae7 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 11:25:10 +0200 Subject: Adding upstream version 1.47.0. Signed-off-by: Daniel Baumann --- lib/e2p/parse_num.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 lib/e2p/parse_num.c (limited to 'lib/e2p/parse_num.c') diff --git a/lib/e2p/parse_num.c b/lib/e2p/parse_num.c new file mode 100644 index 0000000..e8d6283 --- /dev/null +++ b/lib/e2p/parse_num.c @@ -0,0 +1,91 @@ +/* + * parse_num.c - Parse the number of blocks + * + * Copyright (C) 2004,2005 Theodore Ts'o + * + * %Begin-Header% + * This file may be redistributed under the terms of the GNU Library + * General Public License, version 2. + * %End-Header% + */ + +#include "config.h" +#include "e2p.h" + +#include + +unsigned long long parse_num_blocks2(const char *arg, int log_block_size) +{ + char *p; + unsigned long long num; + + num = strtoull(arg, &p, 0); + + if (p[0] && p[1]) + return 0; + + switch (*p) { /* Using fall-through logic */ + case 'T': case 't': + num <<= 10; + /* fallthrough */ + case 'G': case 'g': + num <<= 10; + /* fallthrough */ + case 'M': case 'm': + num <<= 10; + /* fallthrough */ + case 'K': case 'k': + if (log_block_size < 0) + num <<= 10; + else + num >>= log_block_size; + break; + case 's': + if (log_block_size < 0) + num <<= 9; + else + num >>= (1+log_block_size); + break; + case '\0': + break; + default: + return 0; + } + return num; +} + +unsigned long parse_num_blocks(const char *arg, int log_block_size) +{ + return parse_num_blocks2(arg, log_block_size); +} + +#ifdef DEBUG +#include +#include + +main(int argc, char **argv) +{ + unsigned long num; + int log_block_size = 0; + + if (argc != 2 && argc != 3) { + fprintf(stderr, "Usage: %s arg [log_block_size]\n", argv[0]); + exit(1); + } + + if (argc == 3) { + char *p; + + log_block_size = strtol(argv[2], &p, 0); + if (*p) { + fprintf(stderr, "Bad log_block_size: %s\n", argv[2]); + exit(1); + } + } + + num = parse_num_blocks(argv[1], log_block_size); + + printf("Parsed number: %lu\n", num); + exit(0); +} +#endif -- cgit v1.2.3